口算专项训练（ 1）
0.4 ×4 = 2×4.4 = 3.9 ×2 =
2 ×2.8 = 1.6 ×3= 7.4 ×3=
2.4 ×3= 3.7 ×3= 7.1 ×3 =
2.2 ×4 = 8×4.1 = 6.3 ×4=
1.9 ×4= 2.3 ×4= 7 ×2.6 =
6.7 ×4 = 1.9 ×8 = 7.4 ×0 =
4.3 ×1 = 2.2 ×2 = 2.5 ×9 =
6.7 ×8 = 2.3 ×8 = 4.4 ×2 =
5.4 ×6 = 8.2 ×9 = 4.5 ×6 =
3.4 ×8 = 1.9 ×3 = 2×4.3 =
3 ×5.4 = 3 ×6.6 = 3 ×6.7 =
0.3 ×8 = 0.4 ×7 = 3.4 ×4 =
5 ×0.8 = 1.5 ×6 = 6×8.1 =
0.6 ×9= 6.3 ×4= 1.9 ×4 =
2.3 ×3 = 6 ×4.3 = 8×4.3=
3.9 ×2 = 2 ×2.8 = 1.6 ×3=
7.4 ×3= 2.4 ×3= 3.7 ×3=
7.1 ×3 = 2.2 ×4 = 8×4.1 =
3 ×5.4 = 3 ×6.6 = 3 ×6.7 =
0.3 ×8 = 0.4 ×7 =
口算专项训练（ 2）
0.3 ×100 = 0.46 10× = 6.6 ×10=
5.2 ×10 = 2.4 ×10 = 7.9 ×10=
10 ×9.72 = 2.3 1 ×10= 10 ×3.3 1=
10 0 ×6.8 = 10 ×8.37 = 1 0 ×4.6 =
10 ×5.66 = 0.1 ×10 = 10×8.5 =
68.2 ×10 = 51.2 ×100 = 4.2 ×100 =
10.3 ×10= 1.3 ×10 = 1000 ×5.4 =
5.3 ×100 = 1000 ×6.73= 10×8.1 =
100 ×7.4 = 8.87 ×100= 8.98 ×100=
8.8 ×10 = 1000 ×5.2 = 100 ×2.05 =
4.9 ×1000= 10×0.22 = 1000 ×2.2 =
10 ×2.3 = 100 ×2.6 = 100 ×2.8 =
1.67 ×1000 = 7.4 ×10 = 2.4 ×1 00=
100 ×3.19 = 100 ×3.2 = 2.2 ×100 =
100 ×3.8 = 9.9 ×1000 = 100 ×4.1 =
6.3 7 ×10 = 100×4.1 = 0.3 ×10=
1000 ×0.3 5= 10 ×4.38 = 6.4 ×100 =
2.5 6 ×100= 13.4 ×10= 0.5 ×100 =
0.5 ×10 = 20.6 ×1 00= 0.9 100× =
100 ×10.8 = 10×4.52 = 1000 ×5.41 =
小数乘整数 (3)
口算专项训练（ 3）
2.4 ×1 00= 100 ×3.19 = 0.3 ×10=
1000 ×0.3 5= 10 ×4.38 = 6.4 ×100 =
2.5 6 ×100= 13.4 ×10= 100 ×3.2 =
2.2 ×100 = 100 ×3.8 = 9.9 ×1000 =
9.5 ×100 = 100×6.76 = 5.5 ×10 =
100 ×6.93 = 9.2 ×100 = 10.3 ×10=
1.3 ×10 = 1000 ×5.4 = 5.3 ×100 =
1000 ×6.73= 1.46 100× = 27.4 100× =
2.54 1000× = 3.76 100× = 7.17 1000× =
2.25 1000× = 100×4.15 = 8.3 ×5 =
100×8.35 = 10 ×8.38 = 7.8 10× 0=
10 ×8.64 = 10×8.9 = 7.4 ×100 =
4.36 ×100 = 1.25 8=× 0.25 4=×
3.2 ×5= 7.2 ×6= 4 ×6.1 =
8.4 ×2 = 10 ×6.48 = 5.1 3 ×100=
100×8.2 7= 4.31 ×8= 8.22 ×3 =
1000 ×5.4 = 5.3 ×100 = 1000 ×6.73=
10×8.1 = 100 ×7.4 = 8.87 ×100=
2.8 ×30= 8.3 ×2 = 7.5 ×2 0=
7.9 ×2 = 6.6 ×4 = 4 ×5.5 =
口算专项训练（ 4）
3.76 100× = 7.17 1000× = 2.25 1000× =
1.25 8=× 0.25 4=× 3.2 ×5=
7.2 ×6= 1000 ×6.82 = 100 ×8.3 =
100×4.6 = 0×5.6 = 58.1 ×100 =
14.1 ×4= 7 ×2.1 = 100×5.3 =
44.2 ×100= 100×8.05 = 100 ×8.2 =
4.3 6 ×10 = 100×8.35 = 4.9 ×1000=
10×0.22 = 1000 ×2.2 = 10 ×2.3 =
100 ×2.6 = 100 ×2.8 = 1.67 ×1000 =
7.4 ×10 = 2.4 ×1 00= 3.9 ×2 =
2 ×2.8 = 1.6 8 10=× 7.45 ×100=
2.4 ×3= 0.7 10=× 7.1 ×100 =
2.2 ×4 = 8×4.1 = 3 ×5.4 =
100×6.6 = 3 ×6.7 = 0.3 ×8 =
0.4 ×7 = 8.4 ×2 = 9.5 ×100 =
100×6.76 = 5.5 ×10 = 100 ×6.93 =
9.2 ×100 = 5.2 6 ×10 = 2.5 ×100 =
0×5.6 = 58.1 ×100 = 14.1 ×4=
7 ×2.1 = 100×5.3 = 44.2 ×100=
口算专项训练（ 5）
7.2 4 ×100 = 7.4 ×100 = 8.4 ×2 =
9.5 ×100 = 100×6.76 = 5.5 ×10 =
100 ×6.93 = 9.2 ×100 = 5.2 ×10 =
2.5 ×100 = 8.8 ×7= 7.5 3×=
7.4 ×4 = 1.3 4 ×8 = 100×8.05 =
100×8.2 = 100×9.2 = 6.6 ×10=
5.2 ×100 = 0.4 ×6 = 0.92 ×3 =
0.17 ×2 = 2.3 100× = 10 ×3.3 =
3.2 ×5= 5.1 ×5= 4.1 ×5=
4.3 4 ×2 = 8.2 ×100 = 10 ×8.38 =
4.31 ×8= 8.22 ×3 = 10 ×8.38 =
7.81 ×100 = 2.33 ×4= 6 ×4.2 2=
8×4.3= 4 ×4.4 1= 2.5 ×100 =
3.2 ×4= 8 ×4.2= 8.9 ×2 =
3.2 ×10= 8.8 3 ×100= 10×4.72 =
8.8 ×10 = 8.3 ×10= 7.5 ×2 =
9.22 ×100 = 5.2 ×10 = 2.5 ×100=
100 ×7.2 = 7.5 ×10 = 7.4 ×100 =
口算专项训练（ 6）
4×0.25= 0.5 ×1.1= 0.8 ×0.5=
0.5 ×100= 0.2 ×0.5= 60×0.5=
8.5 ×100= 30×0.5= 0.78 ×0.2=
3.9 ×20= 0.5 ×0.28= 0.8 ×0.9=
1.5 ×8= 1.5 ×5= 3.6 ×0.2=
2.5 ×8= 4×0.25= 7.25 ×4=
1.9 ×40= 3.4 ×0.7= 3.6 ×5=
2.5 ×2= 0.5 ×10= 0.6 ×8=
2.1 ×2= 5.6 ×100= 4.5 ×2=
3.08 ×0.01= 4.95 ×1000= 6.9 ×0.1=
0.4 ×0.5= 2.8 ×10= 0.7 ×0.8=
0.4 ×20= 0.8 ×7＝ 0.7 ×8＝
1.32 ×8＝ 10.3 ×2＝ 3.5 ×0.2＝
0.9 ×0.3＝ 5×0.6＝ 10×0.05＝
0.13 ×7＝ 0.7 ×4＝ 0.05 ×4＝
12.5 ×8＝ 0.4 ×50＝ 3.25 ×0＝
2.3 ×4＝ 2.6 ×3＝ 7.5 ×0.1＝
0.45 ×0.2＝ 4.1 ×2＝ 3.5 ×0.01＝
9×0.5＝ 0×9.8＝ 3.9 ×0.3＝
4.1 ×2＝ 2.6 ×3＝ 1.25 ×8＝
7.5 ×0.1＝ 1×0.06＝ 0.9 ×0.3＝
口算专项训练（ 7）
9×0.5= 2.5 ×0.4= 0.4 ×25＝
8.2 ×0.8= 0.2 ×0.4= 0.22 ×4=
0.9 ×0.2= 3.99 ×1= 4×0.3=
30×0.1= 0.5 ×0.2= 1×0.08=
4.8 ×0.5= 2.01 ×0= 2.4 ×5=
1.25 ×8= 0.21 ×100= 3.4 ×0.4=
7.8 ×0.5= 2.9 ×9= 100 ×0.8=
6.8 ×0.4= 0.8 ×0.1= 0.7 ×40=
8.1 ×5= 0.8 ×0.25= 1×0.98=
0.8 ×0.5= 0.5 ×40= 0.125 ×8=
0×0.54= 4×0.25= 1.25 ×8 =
0.125 ×8＝ 0.8 ×12.5= 2.5 ×0.4＝
0.18 ×10＝ 0.1 ×0.02= 1.8 ×0.5=
32×2.5＝ 0×0.54= 4×0.25=
1.25 ×8 = 0.125 ×8＝ 0.8 ×12.5=
2.5 ×0.4＝ 0.18 ×10＝ 0.1 ×0.02=
1.4 ×0.5= 32×2.5＝ 2.4 ×5=
0.36 ×10= 3.14 ×100= 2.5 ×0.04=
1.5 ×0.8= 3.6 ×500= 6.5 ×20=
7.8 ×5= 0.008 ×1000＝ 0.125 ×6=
72×0.4= 1.5 ×0.5= 10.1 ×30=